Gas torch



E. S. HUF'F GAS TORCH Oct. 9, 1934.

Filed Oct. 21. 1951 INVENTOR. Z arr/71m 5 flax-v7 A TTORNEY.

Patented Oct. 9, 1934 sire.

PATENT FFIE 2 Claims.

My invention relates to gas torches and objects of my improvements areto provide an improved torch that may be readily assembled, that willnot fire back so as to burn the hand of the operator and that will forma concentrated flame of special intensity at a definite pomt.

I accomplish this object in the device illustrated in the accompanyingdrawing, in which:-

Figure 1 is a section on the broken line I, I, Figure i.

Figure 2 is a sectional view on the line II, II, Figure 1, looking inthe direction of the arrows.

Figure 3 is a detail plan view, the parts being partly separated toillustrate their construction and method of putting the same together.

Figure 4 is an elevation partly in section on the line IV, IV, Figure 1,looking in the direction of the arrows.

1 is a hollow cylindrical handle. 2 is a gas tube coaxial with thehandle 1, said tube is screw threaded at its ends and at one end engagesa flanged nut 3 with its screw threads, and at the other a plug l. Theflange of the nut 3 is of the same diameter as the handle 1, and itengages against the end oi said handle. The flange nut 3 and the plug 4form the end walls of the handle.

The plug 4 is provided with a flange 4a which is cut out at regularintervals to form the slots 4b to admit of the engagement of lugs 1a,la, la (Fig. 3) in the cut out portion of the flange id. The tube 2engaging coaxially with the nut 3 and plug 4 hold the same firmlyagainst the ends of the handle 1.

Under the lugs la, la, la, the metal of the plug 4 is scooped out, asindicated in Figure 1, and there formed a passage 40 for air through thewall of the plug opening to the scooped out portion. These scooped outportions open through the end of the handle but do not open to theinterior of the handle.

its is a small delivery passage for gas under pressure from the tube 2.The end of the tube converges to the center of the passage, through theplug 4, and the openings 40 permit air to enter back of the aperture at2a.

5 is a tube of uniform cross section, forming a continuation of thepassage through the plug 4. A jet of gas under pressure is deliveredfrom the aperture 2d, centrally of the pipe, or chamber, 5 and acts toform a combustible mixture with the air entering through the holes 40,and to thoroughly mingle the air and gas and force the same forward byits energy of motion.

5 is a nozzle fitted upon the pipe 5, at its outer end, and soconstructed that the combustible mixture coming from the pipe 5 willhave a smooth and uninterrupted surface on entering the nozzle 6. Theinner walls of the nozzle 6 converge uniformly from the delivery end ofthe pipe 5 to the outer end of the nozzle 6. Such walls, if continued,would meet at a point '7, as shown in Figure 1.

I have found that by this construction the air and gas is thoroughlymixed in the pipe 5, and the advancing column of combustible mixture isgradually diminished in cross section by the walls of the nozzle 6, andthat very intense heat is thereby produced at the point '7.

Should a back-fire occur it will be projected through the scooped outportions at the periphcry of the plug 4 and will not burn the hand ofthe operator.

What I claim is:-

1. In a gas torch the combination of a cylindrical handle having lugsformed at its engaging end, a plug provided with a peripheral flange,said flange being slotted at intervals and said lugs fitting into saidslots, said slots opening at the end of the handle but closed againstthe interior of said handle, and an air passage leading inward from theslotted portion of said plug under the lugs formed at the edge of thehandle.

2. In a gas torch the combination of a cylin drical handle having lugsformed at its engaging end, a plug provided with a peripheral flange,said flange being slotted at intervals and said lug fitting into saidslots, said slots opening at the end of the handle but closed againstthe interior of said handle, and an air passage leading inward from theslotted portion of said plug under the lugs formed at the edge of thehandle, a coaxial aperture through said plug, a nut adapt-- ed to engagethe other end of said handle and a tube having its ends screw threadedand engaging said plug and nut.

EDWARD S. HUFF.

